Add SafeAreaElement

Packages/MinimalUtility/Runtime/UIToolkit/MinimalUtility.UIToolkit.asmdef

@@ -0,0 +1,22 @@
+{
+    "name": "MinimalUtility.UIToolkit",
+    "rootNamespace": "MinimalUtility.UIToolkit",
+    "references": [],
+    "includePlatforms": [],
+    "excludePlatforms": [],
+    "allowUnsafeCode": false,
+    "overrideReferences": true,
+    "precompiledReferences": [],
+    "autoReferenced": true,
+    "defineConstraints": [
+        "ENABLE_UITOOLKIT"
+    ],
+    "versionDefines": [
+        {
+            "name": "com.unity.modules.uielements",
+            "expression": "",
+            "define": "ENABLE_UITOOLKIT"
+        }
+    ],
+    "noEngineReferences": false
+}

Packages/MinimalUtility/Runtime/UIToolkit/SafeAreaElement.cs

@@ -0,0 +1,53 @@
+using UnityEngine;
+using UnityEngine.UIElements;
+#if UNITY_EDITOR
+using Screen = UnityEngine.Device.Screen;
+#else
+using Screen = UnityEngine.Screen;
+#endif
+
+namespace MinimalUtility.UIToolkit
+{
+    /// <summary>
+    /// セーフエリアを考慮した<see cref="VisualElement"/>.
+    /// </summary>
+    public class SafeAreaElement : VisualElement
+    {
+        /// <summary>
+        /// UIBuilderのLibraryに登録するためのUXML要素のファクトリクラス.
+        /// </summary>
+        public class SafeAreaFactory : UxmlFactory<SafeAreaElement, UxmlTraits>
+        {
+        }
+
+        /// <summary>
+        /// Initializes a new instance of the <see cref="SafeAreaElement"/> class.
+        /// </summary>
+        public SafeAreaElement()
+        {
+            style.flexGrow = 1;
+            style.flexShrink = 1;
+
+            RegisterCallback<GeometryChangedEvent>(OnGeometryChanged);
+
+#pragma warning disable SA1313
+            void OnGeometryChanged(GeometryChangedEvent _)
+#pragma warning restore SA1313
+            {
+#if UNITY_EDITOR
+                if (panel.GetType().Name == "EditorPanel") return;
+#endif
+                Rect safeArea = Screen.safeArea;
+                Vector2 leftTop
+                    = RuntimePanelUtils.ScreenToPanel(panel, new (safeArea.xMin, Screen.height - safeArea.yMax));
+                Vector2 rightBottom
+                    = RuntimePanelUtils.ScreenToPanel(panel, new (Screen.width - safeArea.xMax, safeArea.yMin));
+
+                style.marginLeft = leftTop.x;
+                style.marginTop = leftTop.y;
+                style.marginRight = rightBottom.x;
+                style.marginBottom = rightBottom.y;
+            }
+        }
+    }
+}